Julie Hill talks to the people who enhance sound with vision. Traditionally, cover artists provide a crucial component in the packaging of an album; however in the age of downloading, cover art has become optional. Artist and musician Chris Knox talks about a lifetime of designing his own distinctive cover art and videos and Sarah-Jane Parton talks us through her drawings on the cover of her partner Luke Buda's solo album. Plus a look at the labels who maintain a visual brand and an overview of good, bad and terrible local covers over the years.